Conductance of Distorted Carbon Nanotubes

Details Conductance of Distorted Carbon Nanotubes Conductance of Distorted Carbon Nanotubes

1999-04-06

arxiv.org/abs/cond-mat/9904083v1

Physical Review B, 60 (1999) 13824-13830.

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages RevTeX including 4 figures, submitted to PRB

Scientific paper

We have calculated the effects of structural distortions of armchair carbon nanotubes on their electrical transport properties. We found that the bending of the nanotubes decreases their transmission function in certain energy ranges and leads to an increased electrical resistance. Electronic structure calculations show that these energy ranges contain localized states with significant $\sigma$-$\pi$ hybridization resulting from the increased curvature produced by bending. Our calculations of the contact resistance show that the large contact resistances observed for SWNTs are likely due to the weak coupling of the NT to the metal in side bonded NT-metal configurations.

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